Apparatus for producing comminuted material.



J. W. COX..

APPARATUS FOR PRODUCING COMMINUTED MATERIAL.

APPLICATION FILED FEB. 10, 19!].

'1 ,296,926. Patented Mar. 11,1919.

3 SHEETS-SHEET I- r 4 awuwwtoz Gnome/1 J. W. COX.

APPARATUS FOR PRODUCING COMMINUT ED MATERIAL. APPLlCATlON FILED FEB. 10,19w.

1,2596,926. v Patented Mar. 11, 1919.

3 SHEETSSHEET 2.

J W. COX.

APPARATUS FOR PRODUCING COMMINUTED MATERIAL. APPLICATION FILED FE8.10,1917.

Patented Mar. 11, 1919.

3 SHEETS-SHEET 3- I I WWW mm UTED STATES *PATNT oEEroE.

VANIA.

if JOHN w. cox, or ERIE, PENNSYLVANIA, ASSIGNOR or oNE-roUn'rH TO GEORGEE. METCALF AND cNE-roUE'rn' T0 EDWARD E. wanxna, .BO'lI-I orERInrENNSYL- APPARATUS FOR PRODUCING COMMINUTED MATERIAL.

Specification of Letters Patent.

Patented Mar. 11,1919.

Application filed February 10, 1917. Serial No. 147,774.

To all whom it may concern:

Be it known that I, JOHN l/V. Cox, a subject of the King of GreatBritain, having declared my intention of becoming a citizen of theUnited States, residing at Erie, in

the county of Erie and State of Pennsylvania, have invented new anduseful Tmprovements in an Apparatus for Producing -Comminuted Material,of which the follow- 1O- thereof as will be hereinafter fully describedand pointed out in the claims.

There may be diflerent uses to which this apparatus may be put but theparticular use for which'the specific apparatus shown is designed is toproduce comminuted fuel. Powdered fuel is burned ordinarily by blowingit into a furnace with a blast of air.

One of the difiiculties experienced in the burning of powdered fuelarises from a fail ure -to uniformly pulverize'the coal from whichit isproduced. WVith this invention this difficulty. is obviated.

The invention is illustrated in the accompanying drawings asfollowsz-Figure 1 isa side elevation of the device, partly in section.

Fig.- 2 an enlarged central section of the separating chamber on theline 2-2 in F ig.-4.

Fig. 3 a section on the line 3.3 1n Fig. 2.

Fig. 1 a section on the line H in Fig. 2.

Fig. 5 an enlarged elevation, partly in sec- 7 tion, showing details ofconstruction of the slanting plates over which material slides.

Fig. 6 a plan view of the parts shown in Fig. I

Fig. 7 an enlarged section showing the plate adjusting device.

91 marks a separating chamber. This is simply. a-box-like structureinclosed ordi- 45.

narily by sheet metal walls. Arranged in this chamber are the slantingplates 2. Preferably there are a series of these plates arranged oneabove the other and off-set one from the other so that the materialsliding from one of the plates is deposited on the succeeding plate, thearrangement of the plates leaving a passage between them. The plates aremounted on the rods 3 which extend through the chamber 1. Each of theplates is provided with a series of openings 4 extending across thelower ends of the plates and deflecting plates or shutters 5 arearranged over these openings. The end shutters 5 of each series arecarried by the rods 5 and the central shutters by the rod 3. Levers 6extend from the shutters 5- and these are connected by the links 7. Alever 8 is mounted on a rod 3 outside of the chamber 1. The outer end ofthe lever 8 travels over a segment 9 having a series of locking openings10 therein and the arm is provided with a pin 11 which may be placed inthe openings so as to lock the lever in adjustment. The rod 3 forms thesupport of the plate and also the means of adjustment for the shutters.The material slides down the plates 2 and the shutters are so adjustedthat material in a thin stream is delivered through each of the openings4. By thus dividing up the streams all particles of the material aresubjected to the current of air.

An adjusting rod 12 supports the free end of each of the plates. It isin the form of a bail or crank, the ends extending through openings 13in the sides ofthe chamber 1 (see Fig. 7). An arm 1 1 is secured to theend 13. The end of the arm 14 operates over a segment 15, the segmenthaving openings 15 into which a pin 14 of the arm 14: extends to lockthe arm in adjustment. It will be readily seen that by swinging the rod12 any desired inclination may be givento the plates 2. Thisvariation'in adjustment is particularly shown in Fig. 2 wherein'theextreme adjustment is shown in dotted lines.

Material is carried'up to the upper plate 2 through an elevator 16, theelevator belt' 18 being shown in Fig. 2 as passing over the pulley 19.The material is deposited from the elevator on to the upper plate 2 andpasses by plates.

In order to break the momentum of the material as it is deposited on theplate 2 1 provide the damper or shutter 20. This is formed of a seriesof separate bars hinged at 21 and its purpose is not to prevent the flowof material along the plate 2 but to check the momentum given to thematerial as it is thrown from the elevator so that there will be an evenstream of material passing doWn over the plates. This gate not onlychecks the material and facilitates the spreading of the material overthe plate but also forms an air gate.

Air is passed through the passages 2 This is accomplished in the deviceshown as gravity down over the series of discharged through the pipe 26.

follows: A. pipe'22 leads from the upper part oi'i the chamber to thecenter of a fan 23 so that the air is drawn from the chamber to thisfan. It is discharged from the fan by a pipe 24 which leads to acentrifugal separator 25, the pipe 2% discharging into --the separatorin a tangential direction. The

dust particles are carried to the outer wall of the separator bycentrifugal force, thus separating them from the air. The particles thenmove down the wall by gravity and are drawn by a pipe 27 from the centerof the separator and thepipe 27 leads to the bottom of the chamber 1.'It will be readily seen that air is circulated in this way and that'byproperly proportioning the fan the velocity of the air can be graduatedso as to take up only the finer particles of material. The dropping ofthe material by gravity through the passages 2 tends to separate theparticles so as to give the air a free play upon the differentparticles. The

finer particles having less weight than will "overcome the force of theair to which they are exposed are taken up by the air while the largerparticles pass through the air and are carried from plate to plate andfinally discharged at the bottom of the chamber 1. An air gate isprovided at the bottom of the chamber 1. This consists of the shutter 28which is pivoted on a trunnion .29. eighted arms 30 are secured to thetrunnions 29 and normally hold the gate 28 in closed position. When thematerial has accumulated to'some extent above the gate 28, theweightotthe material on the gate opens it and the material is discharged, thegate 1. In an apparatus for producing comminuted material, thecombination of a slanting plate over 'WlllCll the material is passed,said plate having an opening through which the material is dischargedfrom the plate;

a rod on which the plate is mounted; a shutter operating over theopening andpivotally mounted concentric withthe rod; concentric IDGELHSforadjusting thev plate and shutter; and means for directing a currenttot" air through the material as it is discharged from the plate.

2. 'In an apparatus for producing commi- Air is V my hand.

' nuted material the combination of a slanting plate having a series ofopenings; pivotally mounted shutters over said openings;

arms extending from said shutters; links connecting said arms; aswinging mounting for the plate; means concentric with the mounting foroperating-the arms controlling the shutters; and means for directing acurrent of air below the openings and in a direction to operateluponmaterial falling through the openings.

3. In an apparatus for producing comminuted material, thecoinbination ofdevices for conveying the material and directing the same-to fallbygravity in an open stream across an alrpassage; meansfor creating acurrent ofa'ir throughthe passageand falling material, comprising a tan;pipes connecting the fan with the inlet and outlet of said passage; anda separator arranged in the pipe circuit. y r V V 4:. In an apparatusfor producing commi-i nuted material, the combination of a slantingplate over Whichthe material is passed; 1 i

and from which it falls by gravity mean's for direct-in a' current ofair ithrou' h the V p s material as it falls bygrav1ty, comprisinga pipecircuit leading to and from the falling material; means fordriving theair through 1 t the pipe circuit; and a;;separator in said circuit; 5.In an apparatus for producing comminuted material, the combination ofdevices for conveying. the 'material and spreading V and directing thesame to fallby gravity'in an open streamacross an air passage; means ifor creating a current of air through the passage and falling material;and take. up

the finer particles of material; means for gathering the largerparticlesof'm aterial;

apparatus-for .pulverizing the larger particles of material so gathered;means for conveying the larger particles of material so gathered to-thepulverizing"apparatus;- Y

and means'for' carrying the material from the pulverizing apparatus tosaid devices.

6; In an apparatus for producing comminuted material, the combinationofdevices for conveying the material and spreading and directing the sameto fall by gravity in an open stream across an air passage; means for.creating a current of air through the passage comprising a pipe circuitleading to and from'the passage; a separator in the pipe circuit; meansfor gathering the larger particles of material escaping troni'the air;

. apparatus for pulveriz'ing the larger particles so gathered; and meansfor returning 7 the particles pulverized to said devices.

In' testimony whereotlhave hereunto-set 7 Copies of this patent may beobtained for five cents each, by addressing the Commissi'oneif ofPatents,

Washington, D. C. 7

